Andre makes a trip to mexico. he exchanges some dollars for pesos at a rate of 20 pesos per dollar. while in mexico, he spends 9000 pesos. when he returns, he exchanges his pesos for dollars (still at 20 pesos per dollar). he gets back 1/10 the amount he started with. find how many dollars andre exchanged for pesos and explain your reasoning. if you get stuck, try writing an equation representing andre’s trip using a variable for the number of dollars he exchanged.

Design a number line containing five (5) points2.benin, one of the smallest countries in africa, has a total area of 43,475 square miles. the population of the country was recently estimated at 10,160,555. about 3,657,790 people live in rural areas. the country has only about 870 miles of surfaced roads. a. round off the total population to the nearest hundred thousand people. b. round off benin’s area in square miles to the nearest thousand. c. round off the number of miles of surfaced roads to the nearest ten. d. round off the number of people who live in rural areas to the nearest million.

The system of equations graphed below has how many solutions? y = 2x + 2

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1